Datasheet

bq24070
bq24071
SLUS694F –MARCH 2006–REVISED DECEMBER 2009 www.ti.com
ELECTRICAL CHARACTERISTICS
over junction temperature range (0°C ≤ T
J
≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT BIAS CURRENTS
I
CC(SPLY)
Active supply current, VCC V
VCC
> V
VCC(min)
1 2 mA
V
IN
< V
(BAT)
Sleep current (current into BAT
I
CC(SLP)
2.6 V ≤ V
I(BAT)
≤ V
O(BAT-REG)
, 2 5
pin)
Excludes load on OUT pin
V
I(AC)
≤ 6V, Total current into IN pin with
I
CC(IN-STDBY)
Input standby current chip disabled, Excludes all loads, CE=LOW, 200
after t
(CE-HOLDOFF)
delay
μA
Total current into BAT pin with input present
and chip disabled;
I
CC(BAT-STDBY)
BAT standby current Excludes all loads, CE=LOW, 45 65
after t
(CE-HOLDOFF)
delay,
0°C ≤ T
J
≤ 85°C
(1)
I
IB(BAT)
Charge done current, BAT Charge DONE, input supplying the load 1 5
OUT PIN-VOLTAGE REGULATION
bq24070 V
I(AC)
≥ 4.4 V + V
DO
4.4 4.5
Output regulation
V
O(OUT-REG)
V
voltage
bq24071 V
I(AC)
≥ 6 V + V
DO
6.0 6.3
OUT PIN – DPPM REGULATION
V
(DPPM-SET)
DPPM set point
(2)
V
DPPM-SET
< V
OUT
2.6 3.8 V
I
(DPPM-SET)
DPPM current source Input present 95 100 105 μA
SF DPPM scale factor V
(DPPM-REG)
= V
(DPPM-SET)
× SF 1.139 1.150 1.162
OUT PIN – FET (Q1, Q2) DROP-OUT VOLTAGE R
DS(on)
)
V
I(AC)
≥ V
CC(min)
, Mode = High,
V
(ACDO)
AC to OUT dropout voltage
(3)
300 475
I
I(AC)
= 1 A, (I
O(OUT)
+ I
O(BAT)
), or no input
mV
BAT to OUT dropout voltage
V
(BATDO)
V
I (BAT)
≥ 3 V, I
I(BAT)
= 1.0 A, V
CC
< V
I(BAT)
40 100
(discharging)
OUT PIN - BATTERY SUPPLEMENT MODE
Enter battery supplement mode V
I(OUT)
V
BSUP1
(battery supplements OUT current V
I(BAT)
> 2 V ≤ V
I(BAT)
in the presence of input source – 60 mV
V
V
I(OUT)
V
BSUP2
Exit battery supplement mode V
I(BAT)
> 2 V ≥ V
I(BAT)
– 20 mV
OUT PIN - SHORT CIRCUIT
Current source between BAT to OUT for
I
OSH1
BAT to OUT short-circuit recovery short-circuit recovery to 10 mA
V
I(OUT)
≤ V
I(BAT)
–200 mV
R
SHAC
AC to OUT short-circuit limit V
I(OUT)
≤ 1 V 500 Ω
BAT PIN CHARGING – PRECHARGE
Precharge to fast-charge transition
V
(LOWV)
Voltage on BAT 2.9 3 3.1 V
threshold
De-glitch time for fast-charge to t
FALL
= 100 ns, 10 mV overdrive,
T
DGL(F)
22.5 ms
precharge transition
(4)
V
I(BAT)
decreasing below threshold
1 V < V
I(BAT)
< V
(LOWV)
, t < t
(PRECHG)
,
I
O(PRECHG)
Precharge range 10 150 mA
I
O(PRECHG)
= (K
(SET)
× V
(PRECHG)
)/ R
SET
V
(PRECHG)
Precharge set voltage 1 V < V
I(BAT)
< V
(LOWV)
, t < t
(PRECHG)
225 250 275 mV
BAT PIN CHARGING - CURRENT REGULATION
V
I (BAT)
> V
(LOWV)
, Mode = High
I
O(BAT)
Battery charge current range
(5)
I
OUT(BAT)
= (K
(SET)
× V
(SET)
/ R
SET
), 100 1000 1500 mA
V
I
(OUT) > V
O
(OUT-REG) + V
(DO-MAX)
R
PBAT
BAT to OUT pullup V
I (BAT)
< 1 V 1000 Ω
(1) This includes the quiescent current for the integrated LDO.
(2) V
(DPPM-SET)
is scaled up by the scale factor for controlling the output voltage V
(DPPM-REG)
.
(3) V
DO(max)
, dropout voltage is a function of the FET, R
DS(on)
, and drain current. The dropout voltage increases proportionally to the
increase in current.
(4) All de-glitch periods are a function of the timer setting and is modified in DPPM or thermal regulation modes by the percentages that the
program current is reduced.
(5) When input current remains below 2 A, the battery charging current may be raised until the thermal regulation limits the charge current.
4 Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated
Product Folder Link(s): bq24070 bq24071